基于重叠写入啁啾光栅的Fabry-Perot腔的研究  

Research for Fabry-Perot cavity based on superimposed and chirped Bragg grating

作　　者：裴丽[1] 杨光[1] 彭万敬[1] 李卓轩[1] 

机构地区：[1]北京交通大学光波技术研究所,北京100044

出　　处：《光电子．激光》2011年第2期193-196,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60771008;60837002);留学回国人员基金资助项目(教外2008890);教育部博士点基金资助项目(200800040002);北京市自然科学基金资助项目(4082024)

摘　　要：以两段重叠写入的啁啾光栅作为反射面,构成光纤光栅Fabry-Perot(FP)腔。分别采用施加应力法和移动相位掩模板法,在同一段光纤中重叠写入啁啾光栅形成FP腔。使用啁啾量为1nm的相位掩模板进行实验,两种方法曝光后的重叠啁啾光栅都可以形成明显梳状透射光谱。使用移动相位掩模板法,透射光谱的自由光谱范围(FSR)可达0.6 nm。以耦合模理论为基础,用龙格库塔迭代法进行仿真,重叠写入啁啾量为3 nm的啁啾光栅后可形成FSR超过1.3 nm的梳状透射光谱。试验及仿真表明重叠写入啁啾光栅用作FP腔滤波器的可行性,为FP腔的研究提供了新方向。Chirped Bragg gratings were used as reflecting planes to construct Fabry-Perot（FP） cavity.Superimposed and chirped Bragg gratings in the same position of fiber were achieved by applying stress and moving photo mask respectively.In the experiment for the photo mask with 1 nm chirp,obvious comb-like transmission spectra could be obtained by both two methods above.Free spectrum range of transmission spectrum can be 0.6 nm with the method of moving photo mask.The classical coupled mode theory is taken for simulation with the Runge-Kutta′s method.The result shows that it can form comb-like transmission spectrum with the free spectrum range beyond 1.3 nm.It is proved by experiments and simulations that the expensive FP cavity can be replaced by the cheap and mature superimposed chirped Bragg grating,which provides a new direction of FP cavity research.

关 键 词：重叠写入啁啾光栅 Fabry-Perot(FP)腔 耦合模理论 

分 类 号：TN253[电子电信—物理电子学]